Small nickel nanoparticle arrays from long chain imidazolium ionic liquids

Yang, Mei; Campbell, Paul S.; Santini, Catherine C.; Mudring, Anja-Verena

doi:10.1039/c3nr05048c

Cited by 46 publications

(35 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Work by others has shown that decomposition of [Ni(COD) 2 ] in 1‐alkyl‐3‐methyl‐imidazolium ILs with different alkyl chain lengths and the bis(trifluoromethylsulfonyl)imide anion gave Ni NPs with an average diameter of 2.4–5.4 nm or 4.9–5.9 nm …”

Section: Resultsmentioning

confidence: 99%

“…Work by others has shown that decomposition of [Ni(COD) 2 ] in 1-alkyl-3-methyl-imidazolium ILs with different alkyl chain lengths and the bis(trifluoromethylsulfonyl)imide anion gave Ni NPs with an average diameter of 2.4-5.4 nm [49] or 4.9-5.9 nm. [16] Prechtl [50] Ac ombined TEM and energy dispersive X-ray spectroscopic analysis( EDX, Figure4)s hows only the expected nickel emission lines.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Soft, Wet‐Chemical Synthesis of Metastable Superparamagnetic Hexagonal Close‐Packed Nickel Nanoparticles in Different Ionic Liquids

Wegner

Rutz

Schütte

et al. 2017

Chemistry A European J

View full text Add to dashboard Cite

The microwave-induced decomposition of bis{N,N'-diisopropylacetamidinate}nickel(II) [Ni{MeC(NiPr) } ] or bis(1,5-cyclooctadiene)nickel(0) [Ni(COD) ] in imidazolium-, pyridinium-, or thiophenium-based ionic liquids (ILs) with different anions (tetrafluoroborate, [BF ] , hexafluorophosphate, [PF ] , and bis(trifluoromethylsulfonyl)imide, [NTf ] ) yields small, uniform nickel nanoparticles (Ni NPs), which are stable in the absence of capping ligands (surfactants) for more than eight weeks. The soft, wet-chemical synthesis yields the metastable Ni hexagonal close-packed (hcp) and not the stable Ni face-centered cubic (fcc) phase. The size of the nickel nanoparticles increases with the molecular volume of the used anions from about 5 nm for [BF ] to ≈10 nm for [NTf ] (with 1-alkyl-3-methyl-imidazolium cations). The n-butyl-pyridinium, [BPy] , cation ILs reproducibly yield very small nickel nanoparticles of 2(±1) nm average diameter. The Ni NPs were characterized by high-resolution transmission electron microscopy (HR-TEM) and powder X-ray diffraction. An X-ray photoelectron spectroscopic (XPS) analysis shows an increase of the binding energy (E ) of the electron from the Ni 2p orbital of the very small 2(±1) nm diameter Ni particles by about 0.3 eV to E =853.2 eV compared with bulk Ni , which is traced to the small cluster size. The Ni nanoparticles show superparamagnetic behavior from 150 K up to room temperature. The saturation magnetization of a Ni (2±1 nm) sample from [BPy][NTf ] is 2.08 A m kg and of a Ni (10±4 nm) sample from [LMIm][NTf ] it is 0.99 A m kg , ([LMIm]=1-lauryl-3-methyl- imidazolium). The Ni NPs were active catalysts in IL dispersions for 1-hexene or benzene hydrogenation. Over 90 % conversion was reached under 5 bar H in 1 h at 100 °C for 1-hexene and a turnover frequency (TOF) up to 1330 mol (mol ) h or in 60 h at 100 °C for benzene hydrogenation and TOF=23 mol (mol ) h .

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Soft, Wet‐Chemical Synthesis of Metastable Superparamagnetic Hexagonal Close‐Packed Nickel Nanoparticles in Different Ionic Liquids

Wegner

Rutz

Schütte

et al. 2017

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…A comparison of the T g values of phosphonyl-based ionic liquids with T m of corresponding all-carbon reference ionic liquids containing the same number of side-chain carbons, shows the dramatic impact of the presence of phosphonate functionality upon the phase transition temperatures of the ionic liquids, which demonstrably decreases the T g values of new TSILs. For instance, [C 12 C 1 im][NTf 2 ] comprising a saturated C 12 side chain, has a T m value of 34.9 o C reported by Mudring et al; 9 however, replacement with a phosphonyl unit (IL 11) yields T g of -24.0 o C and converts a crystalline solid to an amorphous liquid. It is reasonable to assume that the introduction of phosphonyl functional group lowered the tendency for crystallization.…”

Section: Resultsmentioning

confidence: 96%

Click chemistry mediated synthesis of bio-inspired phosphonyl-functionalized ionic liquids

et al. 2015

View full text Add to dashboard Cite

ARTICLE This journal isThis study focuses on the synthesis of a class of novel biologically-inspired ionic liquids coupled with a phosphonate group containing short to long side chains (C 3 −C 11 ) via Pudovic reaction. The ionic liquids exhibited very low glass transition temperatures and were hydrophobic in character. This method has the attributes of "click" chemistry with outstanding efficiency, simplicity, yields and regioselectivity. The results of their calcium (II) ligating capability are also presented.

show abstract

“…The properties of the alkyl chains also had a strong impact on the size of Ni nanoparticles prepared from Ni(COD) 2 in imidazolium ionic liquids [36,66,67]. Interestingly, Prechtl, Santini, Dupont and co-workers achieved the roomtemperature synthesis of Ni nanoparticles via the auto-decomposition of Ni (COD) 2 (Fig.…”

Section: Size Control Via the Il Cationmentioning

confidence: 94%

Size Control of Monodisperse Metal Nanocrystals in Ionic Liquids

Lignier

2015

Ionic Liquids (ILs) in Organometallic Catalysis

View full text Add to dashboard Cite

During the last decade, a great interest in the preparation of uniform nanocrystals has offered efficient synthetic strategies to precisely engineer metal, metal oxide and alloy at the nanoscale. Due to their physicochemical properties, ionic liquids (ILs) simultaneously demonstrated their potential in different areas such as nanocrystal synthesis, catalysis and energy. As a result, ionic liquids have been employed for the preparation of monodisperse nanocrystals and the control of their size. This chapter highlights the most promising methods for the synthesis of uniform nanocrystals in ionic liquids which act as a solvent, stabiliser, reducing agent and even precursor. As a result, successful preparations of nanoparticles in the presence of ILs are now available for both noble and earth-abundant elements such as gold, platinum, iridium, silver, palladium, ruthenium, rhodium, copper, nickel, cobalt and iron.The formation mechanisms of these nanocrystals are discussed as well as our mechanistic understanding in conventional organic and aqueous solvents. In addition, the IL approach is compared to leading methods in conventional solvents to make possible the identification of general principles for most metallic elements. By analogy with conventional solvents, these strategies can be adapted to the preparation of semiconductor nanocrystals. These achievements are going to drive the identification of relationships between the nature of ILs components, the physicochemical properties of ILs, the formation of nanocrystals in ILs and the resulting performances of these nano-objects.

show abstract

Small nickel nanoparticle arrays from long chain imidazolium ionic liquids

Cited by 46 publications

References 38 publications

Soft, Wet‐Chemical Synthesis of Metastable Superparamagnetic Hexagonal Close‐Packed Nickel Nanoparticles in Different Ionic Liquids

Soft, Wet‐Chemical Synthesis of Metastable Superparamagnetic Hexagonal Close‐Packed Nickel Nanoparticles in Different Ionic Liquids

Click chemistry mediated synthesis of bio-inspired phosphonyl-functionalized ionic liquids

Size Control of Monodisperse Metal Nanocrystals in Ionic Liquids

Contact Info

Product

Resources

About